CODEWITHSUNDEEP
javajarjruby
Vlad the Impala
Vlad the Impala

Reputation: 15882

Package jruby script as .jar with annotations

Is there a way to package a jruby script as a .jar file with support for annotations? I don't think warbler does this. jruby2java looks like it supported annotations but it hasn't been updated in four years.

Upvotes: 2

Views: 201

Answers (1)

Sébastien Le Callonnec
Sébastien Le Callonnec

Reputation: 26763

The JRuby compiler, which is part of the core JRuby features, has the java_annotation method that allows you to define annotations in your JRuby code.

Here is an example with Spring MVC annotations, where annotations are added on the class GreetingController, and on the print method:

java_import 'org.springframework.stereotype.Controller'
java_import 'org.springframework.web.bind.annotation.RequestMapping'
java_import 'org.springframework.web.bind.annotation.RequestMethod'
java_import 'org.springframework.ui.ModelMap'

java_package 'com.weblogism.myapp'
java_annotation 'Controller'
java_annotation 'RequestMapping("/welcome")'
class GreetingController

  java_annotation 'RequestMapping'
  java_signature 'String print(ModelMap model)'
  def print(model)
    model.add_attribute('greeting', 'Hello, World!')
    "index"
  end
end

(The full example can be found on github; the JRuby compiler is called by the jruby-maven-plugin)

Upvotes: 1

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